It must long ago have appeared how decisive is the answer of Science to the practical question with which we set out as to the possibility of a Spontaneous Development of Spiritual Life in the individual soul. The inquiry into the Origin of Life is the fundamental question alike of Biology and Christianity. We can afford to enlarge upon it, therefore, even at the risk of repetition. When men are offering us a Christianity without a living Spirit, and a personal religion without _conversion_, no emphasis or reiteration can be extreme. Besides, the clearness as well as the definiteness of the Testimony of Nature to any Spiritual truth is of immense importance. Regeneration has not merely been an outstanding difficulty, but an overwhelming obscurity. Even to earnest minds the difficulty of grasping the truth at all has always proved extreme. Philosophically one scarcely sees either the necessity or the possibility of being born again. Why a virtuous man should not simply grow better and better until in his own right he enter the Kingdom of God is what thousands honestly and seriously fail to understand. Now Philosophy cannot help us here. Her arguments are, if anything, against us. But Science answers to the appeal at once. If it be simply pointed out that this is the same absurdity as to ask why a stone should not grow more and more living till it enters the Organic World, the point is clear in an instant.
What now, let us ask specifically, distinguishes a Christian man from a non-Christian man? Is it that he has certain mental characteristics not possessed by the other? Is it that certain faculties have been trained in him, that morality assumes special and higher manifestations, and character a nobler form? Is the Christian merely an ordinary man who happens from birth to have been surrounded with a peculiar set of ideas? Is his religion merely that peculiar quality of the moral life defined by Mr. Matthew Arnold as "morality touched by emotion?" And does the possession of a high ideal, benevolent sympathies, a reverent spirit, and a favorable environment account for what men call his Spiritual Life?
The distinction between them is the same as that between the Organic and the Inorganic, the living and the dead. What is the difference between a crystal and an organism, a stone and a plant? They have much in common. Both are made of the same atoms. Both display the same properties of matter. Both are subject to the Physical Laws. Both may be very beautiful. But besides possessing all that the crystal has, the plant possesses something more--a mysterious something called Life. This Life is not something which existed in the crystal only in a less developed form. There is nothing at all like it in the crystal. There is nothing like the first beginning of it in the crystal, not a trace or symptom of it. This plant is tenanted by something new, an original and unique possession added over and above all the properties common to both. When from vegetable Life we rise to animal Life, here again we find something original and unique--unique at least as compared with the mineral. From animal Life we ascend again to Spiritual Life. And here also is something new, something still more unique. He who lives the Spiritual Life has a distinct kind of Life added to all the other phases of Life which he manifests--a kind of Life infinitely more distinct than is the active Life of a plant from the inertia of a stone. The Spiritual man is more distinct in point of fact than is the plant from the stone. This is the one possible comparison in Nature, for it is the widest distinction in Nature; but compared with the difference between the Natural and the Spiritual the gulf which divides the organic from the inorganic is a hair's-breadth. The natural man belongs essentially to this present order of things. He is endowed simply with a high quality of the natural animal Life. But it is Life of so poor a quality that it is not Life at all. He that hath not the Son _hath not Life_; but he that hath the Son hath Life--a new and distinct and supernatural endowment. He is not of this world. He is of the timeless state, of Eternity. _It doth not yet appear what he shall be._